Self-opening paper bag.



H. G. WIDMER. SELF OPENING PAPER BAG.

APPLIOATIO'N FILED PEB. 14, 1908.

Patented Nov, 17,1908.

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.INVENTOR WITNEssEs fnd/O To all whom 'it may concern:

` of `Kings an i UNITED .STATES PATENT: oFF'IoE,"

noWARD G. VWIDMER, oF BROOKLYN, NEW YORK.

SELF-ernannte PAPER nike.b .v

Noregice. I

Be itknown that I, HOWARDA G. WIDMER', a citizen of the United States, and a resident of the borou h of Brooklyn, in the county State of New York, have in-A vented certain new and useful Improvements in Self-Opening Pa er Bags, of which the following is a speci cation.y y This invention relates to improvements in pa er bags'.

he invention, broadly speaking, seeks efficient and inexpensive means to facilitatey the o ening out of a bag from its fiat or collapsed state and without necessitating the insertion of the hand into the bag. f

The invention also seeks to accomplish the result stated with reference to aper bags of the simpler construction and all means Vso bly which may be of a character capab e of being formed on or applied to the paper with convenience and 'at small cost. Y At this time the paper bags inmost genand a bottom formed y turning over one end, tucks and all, and pasting it down onto one of the sides of the bag. This turned over portion forms afolded bottom closure which extends transversely `and clipped o to facilitate pastin and still the closure Wouldhave a portion w ich extended the entire width of the bag. These plaintucked bags are/sold', of course, in a flat or collapsed state. These bags are inex ensive and are sold in large quantities for t is rea- Vand pressingi'out the tucks at the bottom.

This, of course, vrequires `time and considerable care'to avoid the formation of hap-hazh ard folds atl the "bottom corners, which are veryobjection'able.V Furthermore these ba s, when opened out or lled, do not have at bottoms, the bottoms bein more or less rounded.` This is another efect. The desirability Aof overcoming these defects in a ingly ba Vs of various constructions have b een bag has been long recognized and accordpropose with this object in view. These proposed bags, however, could onlyibe made v y at a very considerabley increase in thel cost-ofk Vbottom closure in'this automatic bag Y substantially straight across the entire width of the bag.

Of course! the corners of this fold might bel Specication of Lettera Paten-tgp; r. y Patented Nov. 17, 1908. Appleman mnd rebrw-y i4, 190s. snm no. scopes. y

reason. A variety of not have ac at bottom and does not open out with. the r uisite promptness and reliability.

in, in the case of at least one Y In accor ance .with the present ,inventionl a bag is provided"` in whichv the defects` andv ob-l ese proposed bags, the bag does l manufacture and are objectionable for this odily upon it e one. piece o material, the `folded margin or f bottom closure therefor extending across Athe entire width o f tlie'bag.l In this s tion, lthe ex ression having infol side tucksand a olded bottom closure eXtendin substantially stra-ight across the entire widt of the ba defines the above described lain bag to w ich this invention applies an kthe lexpression is" intended todistinguish over the bag known= to the trade as the automatic bag in which diamond folds are made in the ba `and a ready 'made fiat bottom is formed an laid over kon one side face of the ba the in formed by a flap in the middle of this folded over, ready ma across the entire widthxof the bag. pression likewise distinguishes over the ba in which the plies of the tucks are infolde near the bottom of the blank and then the bottom margin folded over Vupon a side Iface of the ba to form a closure and lock the infolded p ies in lace. In this type of bag also the bottom c osure does not extendacross the entire width of the bag. In fact, the expression used is intended exclusively to define the cheap, plain type of bag described.

With this invention expensive foldin of tuck plies and bag sides is not resorted lto butsimplel means, which may be applied to a col- 100 lapsed bag with convenience and despatch,

are employed to aid thel lexure of thebag e bottom'an'd not extending 'Said exmaterial along the localities where `fflexure is i required in opening out thefba and in opening out so as' toV orm a flat these means for aidin fiexure may be, and preferably are, of suoliv a character as to be negli 'ble as regards increasin' -the cost over the o d plain tucked bags;A us, the

embodying the invention eil'ect a vgreat sav- 110 ing in cost' as compared with those kproposed heretofore for the same general purposes: .l

ottoni. Also z In the type of the bag referred to above as' -tlie plain tucked .bag the depth of the tucks determines pointsyon the side edgesl of the bag, and these points, in turn, naturally determine. the ap roximate corners of the bag bottom when t 1e bag is opened out. It is through these points that the sides of the bag and the tucks tend to flex when the bag is opened out by inserting the hand and by .simultaneously pushing up the bottom and smootlnng out the sides and the tucks. These points,'therefore, determine natural lines of lexure.

' In carryin out the invention a` corrugation is. specia ly formed in the collapsed ybag through all its thicknesses and along its lines of exure. Thus, eachr thickness will have its own corrugation consisting of two contiguous creases or v'an alternate ridge andl depression, the ridere on one face of a thickness constituting a zdepression onthe o posite face of such thickness. It will, there ore, be seen that each thickness Will havent leastone crease whose concavit will face in the proper direction andsald crease will, in'consequence, aid such thickness.' to flexin'the proper direction notwithstandin the fact that various thicknesses must flex 1n opposite directions in opening out the bag.

It is to be understood that any or alliof the various means for aiding flexur'e may be applied to anyrvor all of the lines of lexure as des'cribed.- The preferable .form vof the i11- ventio'n is illustrated in the following drawingsforming part of this specification, in

which like numerals designate corresponding parts or localities and in. wl1ich:-"

Figure 1 is a perspective viewl showing a f tucked bag opened'. o ut and smoothed' by hand lto form the creases along the transverse lines of lexure of the sides and the oblique lines of lexure of the tucks. Fi 2 is a side elevation of a collapsed bag em ody; ving the invention but with parts broken away to show the tucks.-

sectionV in elevation of a ba'g opened out until its bottom is flat and embodyin the invention; F 5 is a bottom view o a bag such asis illustrated inV Fig. y1 but opened out and with arts broken away to show the tucks.

Re erring now more particularly to thev vdrawings:-',-1"and .2 deslgnate the sides ofv the bag respectively, .which have portions 3 and 4 respectively which are folded together when the ba is collapsed and which form the bottom o the bag Whenit is opened out. The' extent of each of theserportions is determined by the de Jths of the tucks 5V and 6 or in other 'words y the Width'of the tuck lfolds 7 ,'8, 9 and 10. When opened `out the ba has a' thickness equal to' thecombined wi th of the two'folds of each tuck, therefore a portion of the sides suicient to bridge this' thickness must bend in to form the bot- -pasted down onto the tuck folds even to the Fig. 3 1s `an enlarged sec-y tion along line 3 3 of Fig. 2. Fig. 4 is a tom. f In this manner the bottoni corners of the bag Vvwhen opened out are determined andare designated by the numerals 11, 12, 13 and 14. Since, whenthe bag is made,- itsbottom margin 15 is turned over and side of the bag, the inner creases 17 and 18, are fixed to the sides `of the bag valong the bottom edge 16. Thus, in order that the 'tucks may open out and the side portions 3 .and 4 flex in to form a bottom for the bag, the bottom ends of the tucks must fold over on the bias along oblique lines extending from the bottom ends, 19 and 20 of the creases 17 andf18, respectively, yto the'corners 11, l2, 13. and 14 on the edges 21, 22, '23 and' 24, respectively. These lines are termed the oblique lines of exure of the tucks and are best: illustrated in Figs. 1 and 5. y

In a preferred embodiment of this invention a plurality of contiguous creases or one or-more corrugations are artificially formed in the bag material, either before or after the bag is formed, approximately along the transverse lines of flexure of the sides namely along the lines 11-13 and 12'-14 and best .shown .in Figs. 2, 3 and 4." -In addition tov thesecreases on the sides of the bag'there maybe formed with advantage a plurality of contiguous creases or one or more cor-v rugations approximately along the oblique lines of iex'ure of the tucks, namely along' "the lines 19 1l, I9-12, '20-13 and 20-4-14. Each crease or corrugation may be int-ermittent orcontinuous. It has been found to be convenient to apply these oblique 'creases after the 'bag isformed although they may be formed on the bag material before the `bag is'formed. A preferred manner of applying them is' to pass the corners of the collapsed bag beneath suitable dies which crease or corrugate theentire thickness of the collapsed bag. vAn advantage gained by formin a fold will ie provi ed with one crease at least which has its concavity on the face of the fold Where it Will .aid iexing in the greater degree. The corner creases formed on the sides 1 and 2 of the bag during this process are merely incidental and neither aid nor hinder the flexing of the bag in opening out. v

`The formation of a bag easily provided Withy this invention is illustrated in the drawings. 'In Fig.` 5, 15 shows thebottom margin Vpasted down on the portion 4 to'form the bottom closure While 25 and 26 show how the bottom margins of' the'tucks are folded over to complete the closure. VII Wever, in

carrying out inyinvention, I do n ot limit myself to the precise type of ba illustrated as Vvarious types are suitable. ut -What I vclaim and desire to secure by Letters Patent is 1. A paper bag comprising a tube formed `corru ation is that each tuck of one piece of material and having, when g provided, alon collapsed, infolclcd side tucks and, when opened out, a substantially iat bottom, said bag being provided with one or more cor- 5' rugations, localized approximately along the transverse lines of lexure of the sides which i the bag has when it is opened out until its l, name to this specification p bottom is approximately flat.

' 2. In paper bags, a bag comprising a tube l 'formedof one piece of material and having infolded side tucks and a folded bottom closure extending Substantially straight across the entire Width of the bag; said .bag being ing out of the bag.

two subscribing witnesses.

Witnesses I DA Gr. GILMORE, LEONARD DAY.

`904,169.--IfozcardA G.- ll'z'amer, Brooklyn, N. Y. SELF-OPENING Beren BAG.

Patent dated November 17,' 1908. Disclaimer filed 'January 21, 1910, by the v assignee, Cantin-entail I Bag Company. -Enters thiedisclaimer of claim 1 of said Letters Patent, which claim is in the following words, to wit: I Y

1. A paper bagcomprising a'tube-formedof one piece ofY material and having, when collapsed, 'ipfolded Vside tuclfs and, when opened out, a substantially Hat bottom, said bag being provided with one or more corrugations, localized approximately along the transverse lines of exure of the sides whicll the bag has when it is opened out until its bottom is approximately at.-[ Oficial Gazette, February the transverse lines of i tlexure of the sides, and along the oblique lines of i'lexure ofthe tucks, with a. corrugation specially made to aid the proper open- I'nvtestmony whereof, I have signed my in the presence of 20 HOWARD G. WIDMER..

of one piece of material and having, when g provided, alon collapsed, infolclcd side tucks and, when opened out, a substantially iat bottom, said bag being provided with one or more cor- 5' rugations, localized approximately along the transverse lines of lexure of the sides which i the bag has when it is opened out until its l, name to this specification p bottom is approximately flat.

' 2. In paper bags, a bag comprising a tube l 'formedof one piece of material and having infolded side tucks and a folded bottom closure extending Substantially straight across the entire Width of the bag; said .bag being ing out of the bag.

two subscribing witnesses.

Witnesses I DA Gr. GILMORE, LEONARD DAY.

`904,169.--IfozcardA G.- ll'z'amer, Brooklyn, N. Y. SELF-OPENING Beren BAG.

Patent dated November 17,' 1908. Disclaimer filed 'January 21, 1910, by the v assignee, Cantin-entail I Bag Company. -Enters thiedisclaimer of claim 1 of said Letters Patent, which claim is in the following words, to wit: I Y

1. A paper bagcomprising a'tube-formedof one piece ofY material and having, when collapsed, 'ipfolded Vside tuclfs and, when opened out, a substantially Hat bottom, said bag being provided with one or more corrugations, localized approximately along the transverse lines of exure of the sides whicll the bag has when it is opened out until its bottom is approximately at.-[ Oficial Gazette, February the transverse lines of i tlexure of the sides, and along the oblique lines of i'lexure ofthe tucks, with a. corrugation specially made to aid the proper open- I'nvtestmony whereof, I have signed my in the presence of 20 HOWARD G. WIDMER..

Disclaimer in Letters Paitent No. 904,l69.

DISCLAIMER- 904,169.-01/;a7d G. ll'e'rlmer,

Patent dated November 17, 1908.

assignee, onzfz'nenal Paper Eng Company.

said Letters Brooklyn, N. Y.

is opened out until its bottom is approximately flat. 1, 1.910.]

SELF-OPENING PAPER BAG. Disclaimer filed January 21, 1910, by the Patent, which claim is in the 

